Comparison between Sequencing Batch and Continuous Flow Activated Sludge Systems

The feasibility of citric acid as external carbon source for biological phosphorus removal in a sequencing batch biofilm reactor (SBBR)

“…In some studies the classic sequencing batch reactors are shown to be superior to the continuous-flow systems (flexibility in respect of flow and load of contaminants) [2,3], and reactors with biofilm are superior to the suspended activated sludge systems (lesser susceptibility to changes in the load of contaminants, lesser biomass growth, higher biomass concentration, lower volume of reactors) [4][5][6], sequencing batch biofilm reactors (SBBR) are considered as a novel treatment approach.…”

Impact of Uneven Flow Wastewater Distribution on the Technological Efficiency of a Sequencing Batch Reactor

“…The concept of SBR technology consists in wastewater treatment using the activated sludge method, where the biological treatment processes and the separation of activated sludge from treated wastewater take place in the same tank in a sequencing mode, and the treated wastewater is discharged from the chamber in a batch manner (batch operation) [12][13][14]. Sequencing technology determines the nature of the reactor's operation [15,16]. The principle of operation of an SBR reactor is based on the periodic repetition of the following phases, forming the full cycle of operation: (1) filling; (2) aeration/mixing-reaction; (3) sedimentation; (4) decantation and the so-called idle phase; (5) including the time between the end of decantation and the start of the next filling [12,16].…”

“…Compared to flow systems, the use of SBR reactors allows, in some cases, to significantly intensify individual wastewater treatment processes and minimize the drawbacks of conventional systems. For this reason, SBR reactors are becoming competitive with conventional flow reactors [15,21,22]. In addition to the classic solution of SBR technology, there are a number of unconventional solutions, called modified SBRs [23][24][25][26][27][28][29].…”

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

“…6 In low rate processes, SBRs have shown some advantages relative to CAS, which include easy adaptation of cycle duration and HRT to various input circumstances and the lack of need for sludge recycling because sedimentation occurs under stationary conditions. 14 The former means that SBRs are less sensitive to load variations and seasonal changes compared to CAS. 15 Feast–famine regimes reportedly lead to higher biosorption and storage (which are two mechanisms responsible for COD capture during HRAS processes 6 ) and one of the characteristics of SBRs is the occurrence of feast–famine regimes during each cycle.…”